In Tokyo, an armed gangster couple robs a jewelry exhibition in bloodshed. Inspector Okata trails them to Hong Kong. Madam Yeung of Hong Kong Police is assigned to investigate the case. But Okata prefers to act on his own accord. In fact, the renowned jewelry designer himself masterminded the robbery; however, he is ended up being murdered by the couple too. Yeung and Okada have to reconcile to crush the gang.
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